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Phanerozoic Orogenic Lode Gold Deposits
2000Abstract Phanerozoic lode gold deposits are invariably associated with convergent plate margins and occur within close proximity to major translithospheric structures or compressional to transpressional-transtensional shear zones. The deposits are almost entirely structurally controlled and the nature of the immediate host rock does ...
Frank P. Bierlein, Douglas E. Crowe
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Archean Orogenic Lode Gold Deposits
2000Abstract Archean orogenic lode gold deposits are the result of large, complex mineralizing systems that have developed within many Archean terrains. Mineralizing systems are defined to include all geologic factors that control the generation and preservation of mineral deposits and emphasize the processes responsible for deposit ...
Steffen G. Hagemann, Kevin F. Cassidy
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Aseismic Refinement of Orogenic Gold Systems
2018Orogenic gold deposits contribute the majority of gold recovered globally throughout history. However, the mechanism that concentrates gold to extremely high “bonanza” grades within these deposits remains enigmatic. The volume of fluid experimentally required to provide such endowments of gold in a localised area is not reflected in field observations (
Voisey, Christopher +5 more
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Introduction: Macraes Mine as an Orogenic Gold Deposit
2016Orogenic gold deposits are typically dominated by quartz veins in faults. Historic mining at Macraes focused on scattered small quartz veins, with only minor Au production. Modern exploration and mining has developed from these small beginnings into a world class mine operation which has produced >4 million ounces of Au from a total resource exceeding ...
Dave Craw, Doug MacKenzie
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Tectonic-Diffusion Estimate of Orogenic Gold Resources
Economic Geology, 2010Age-frequency data are used to determine amounts of vertical tectonic displacement experienced by the global population of orogenic gold deposits following their emplacement at a crustal depth of 10 ± 1 km. Knowledge of this tectonic dispersion allows for an estimate of the total crustal endowment of gold in orogenic gold deposits.
B. H. Wilkinson, S. E. Kesler
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Structural controls on orogenic gold deposits
Acta Petrologica Sinica, 2023Lin YANG +7 more
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Chapter 8 Orogenic Gold Deposits of China
2019Abstract China produces about 450 t Au per year and has government stated in-ground reserves of approximately 12,000 t Au. Orogenic gold, or gold deposits in metamorphic rocks, and associated placer deposits compose about 65 to 75% of this endowment, with lodes existing as structurally hosted vein and/or disseminated orebodies.
Richard Goldfarb +4 more
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Metabasalts as sources of metals in orogenic gold deposits
Mineralium Deposita, 2014Although metabasaltic rocks have been suggested to be important source rocks for orogenic gold deposits, the mobility of Au and related elements (As, Sb, Se, and Hg) from these rocks during alteration and metamorphism is poorly constrained. We investigate the effects of increasing metamorphic grade on the concentrations of Au and related elements in a ...
Pitcairn, Iain K. +2 more
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Intrusion-related versus orogenic gold, Western Lachlan Orogen, Tasmanides, Australia
Long-lived accretionary orogens like the Tasmanides of eastern Australia have typically undergone a series of compressional and extensional episodes with multiple magmatic and hydrothermal events that shape its rheological, compositional and metallogenic character.Coralie Siégel +8 more
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A Biogeochemical Influence on the Secular Distribution of Orogenic Gold
Economic Geology, 2013Orogenic gold deposits are unevenly distributed in geologic time. The richest period of orogenic gold deposit formation was the Phanerozoic, which followed a >1-b.y. period of relatively meager deposit generation during the Proterozoic. This Proterozoic low-gold period developed despite continent-building episodes, which should have been appropriate ...
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